A simple and reproducible capacitive electrode
| Autor: | Pablo García, Federico Nicolás Guerrero, Marcelo Alejandro Haberman, Enrique Mario Spinelli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Engineering
Capacitive sensing Biomedical Engineering Biophysics Ingeniería INGENIERÍAS Y TECNOLOGÍAS 02 engineering and technology Electrolyte Electric Capacitance 01 natural sciences law.invention 010309 optics non-contact measurements Electrocardiography law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Electric Impedance Electrotecnia Noise level Electrical impedance Electrodes Ingeniería Eléctrica Ingeniería Electrónica e Ingeniería de la Información Ingeniería de Sistemas y Comunicaciones business.industry insulating electrodes 020208 electrical & electronic engineering Bandwidth (signal processing) Electrical engineering Reproducibility of Results Electrode active electrodes Resistor business |
| Zdroj: | SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP |
| Popis: | Capacitive Electrodes (CE) allow the acquisition of biopotentials through a dielectric layer, without the use of electrolytes, just by placing them on skin or clothing, but demands front-ends with ultra-high input impedances. This must be achieved while providing a path for bias currents, calling for ultra-high value resistors and special components and construction techniques. A simple CE that uses bootstrap techniques to avoid ultra-high value components and special materials is proposed. When electrodes are placed on the skin; that is, with coupling capacitances CS of around 100 pF, they present a noise level of 3.3 μVRMS in a 0.5-100 Hz bandwidth, which is appropriate for electrocardiography (ECG) measurements. Construction details of the CE and the complete circuit, including a fast recovery feature, are presented. Facultad de Ingeniería Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales |
| Databáze: | OpenAIRE |
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